M4.7 earthquake 84 km SSE of Hihifo, Tonga
A magnitude 4.7 earthquake struck 84 km SSE of Hihifo, Tonga on Fri, Feb 18, 1977, 12:39 AM GMT-11 (11:39 UTC), 38 km (24 mi) below the surface.
A larger quake followed: M5.1 134 km ESE of Hihifo, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb), light
- Local time
- UTC
- 1977-02-18 11:39:00 UTC
- Depth
- 38.0 km (23.6 mi), shallow
- Epicenter
- 16.619° S, 173.408° W
- Region
- Tonga
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Stations used
- 18
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 3 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000mm3. Read Tue, Sep 22, 2026, 9:41 AM UTC.